Tubular conductor for incandescent electric lamps.



G. wElslsMANN. A TUBULAR CONDUCTOR FOR INCANDESCENT ELECTRIGLA'MPS.

Patented Apr. 20', 1915.

2 SHEETB-SHEET 2.

@www W7 Wngsqes' the tubular conductor.

and the device for closing said ends.

metal ltube 1 which has STATES ,PATENT ori-ion l -sUs'rnvE wErssIANN, or rams, EnANcE, Assumer.` 'ro moin B. EEINE, oir

f A NEW Yoan, n. Y.

munhn coimuc'ron For. mcnjmEscENcr ELECTRIC Lars.

` Application Bled latch 18,

T0 all lwhomit may concern:

Be it knownthat I, GUs'rAvE -W EissrmNN,

a citizen of the French Republic, residing at Paris, in the Republic of France, have 1n- .vented certain new and useful. Improvements in Tubular Conductors for Incandescent Electric Lamps, of which the followini a4 specification.

's invention relates to a tubular conductor designed to receive the sockets of in candescent -lamps or other terminals. lThe tubular conductor can for example be used as foot lights or in connection with lumi--v nous slgns. A

It essentially consists o a tube into which the incandescent lam s are screwed `and which containsA a condlil'ctor insulated; from the conducting tube. The terminals of the lamps are fed with currentby the tube and by the inner conductor.v

This device rmlts of curving the con dultor at will in keeping the same absolutely tig t. Y

In the accompanying ldrawings several *forms o-constru'ction are shown by way ofA example."`

Figure 1 isa cross section of the tubular conductor. Fig. 2 is a cross section through a second form of construction of a tubular conductor. Fig. 3 is a longitudinal section of the tubular conductor shown in Fig.'1. Fig. 4 is a longitudinal section of a third form of construction -of the tubular con-- ductor. Figs. 5 to 9 are cross sections showingeach another modified construction' of Figs. 10 and 11 illustrate theends of the tubular condulctor 12 shows in longitudinal section a device for joining two tubular conductors.

The tubular conductor comprises an outer threaded holes 2dethe sockets 3 of the in- 4. In the tube 1 is a con signed to receive candescent lamps ducting wire 5 is arranged which isy supported and insulated ,from the tube 1 by means of partitions 6 of; insulating material mounted in said tube 1 and having a central hole for the wire 5. 'The inner conductor 5 could further be insulated from the outer tubular conductor 1 by insulating material having threaded holes for the sockets 3 of the incandescent lamps. The incandescent lamps 4 have contact pins 7 projecting from their sockets and designed means of a tube of will of course middle' part and specification @fretten rmnf. 1 Patented Apr.20,1`915.

m4. serial 110,915,673.

fto bear on the inner conductor 5. The outer tubular conductorl and the inner conduce tor 5 are connected 'each with'oneof the poles of the source of electricity. of the lament 8 are connected with the contact pins 7 and with the metal sockets 3 of the incandescent'lamps. All the incandescent lamps 4 are put in shunt'between the conductors 1 and 5.

The outer tube 1 and the inner conductor 5 can be of any convenient shape. For example as shown in Fig. 2, the tubular conductor 9 is of oval cross section and the inner conductor 10 consists of a conveniently insulated metal strip. The'inner conductor is not necessarily straight, it could be undulated as shown in Fig'.'4 downwardly undulations 12 `of the inner conductor 11 would be situated in the partitions 13, the upwardly directed undulations 14' being situated under the holes 2 oi the tube in order to receive the sockets of the lamps in forming an contact between the inner conductor and the contact pin 7 is insured.v The outer tube 1 be insulated either by being painted-.with an insulating varnish or by means` of an insulating sheath -whieh has holes for the sockets of the lamps. As shown'in Fig. 10 in the shape of a metal strip is insulated from `the outer tubular conductor 9 by means of a strip 15 of canvas or cardboard placed on Vthe bottom` of the tubular conductor'9 and having its two edges 16 bent. over the that the v to receive The inner conductor 9 by a stripfil) of insulating ma! 'terial bent over at its edges 18 is slightly curved upward so that it rests on the bottom of the tubular conductor 9 only with its two edges the lamps bearing A the contact being insured by the elasticity of stead of bendingl the metal strip a blade spring 22 (Fig. 7) can be arranged under the same in order to insure the perfect elasticity, the metal strip 201is insulated from the 'blade spring 22 and .'rom the tubular conductor 9 by an insulating wrapper 21.

The ends In thiscase tliev A5 the inner conductor` the metal strip 17. Inl 105 elastic part so that the further be bent so that it'ison the naked The innercon'ductor can further, as shown in Fig. 8,l consistief a band 23 of metal tlssue inclosed an insulating sheath 24 the contact pin 25 of the incandescent lamps being connected so that they can be stu-ck into and through the insulating sheath in order to come in contact with the conductor band 23. The inner conductor can further `consist of a tube 27 separated from the outer tube 26 permits of insert' of a conducting section of the tu can be used such as they have been l without any modificationfor forming canal-A .by an insulat' g tube 28, this construction g a rod or other support or maintaining the support for the incanescent lamps.

In order to make the support for incandescent lamps perfectly tight insulating Stoppers 30 are placed over its ends (Figs. 10 and 11)2 said Stoppers having a circular groove designed to receive outer tube 1 and a central bore for the inner conductor 5, terminals 32, 33 being connected with the outer tube and the inner conductor 5 respectively. .The Stoppers are fixed on the ends of the tubular conductor by means of set screws 31. If said supports are designed for cent lamps of lowvoltage to whicha normal plant ofmuch higher voltage is fed, several of the supports must be mounted in series in order the required reduction of voltage. In this case the connecting blocks Fig. 12, can be used. In a block 34-of insulating material annular grooves are arran ed in either end designed to receive the lens reception of the inner cnductor 5.. The ingscrews 35-36l servefor connecting the several parts with one another. The right hand side tube 1 is connected with the left hand side inner conductor 5'by means rod 37-38. AThe two conductors 5 locatedy in the centralbore are separated-the one from the other'by a disk 39 of insulatin material. Y

The outer-tu 1 (Fig. l). can be a flexible metal tube consisting for example of juxtaposed spirals connected. with one another in any convenient manner. In this tube convenient apertures -fo the sockets of the lamps have to be arranged. i. It is evidently' notnecessary that the lamps lbe arranged as shown in Figs. 3 and 4 on one genel'iating line ofthe other Vtubular conductor. They can` he'arranged on. this tube in any convenient manner, there could even be arranged several lamps on one cross l Thea plication of the tubular conductor which. thrmsthe object of thisinvention are very numerous, it is particularly designed as an ordinary ,ca-

na'lizationv in buildings and further as aconductorsV described subtermean canalization. The

izations. in buildings. For the inner and the end of theL -receiving incandes-y to obtain for the whole plant' of vthe tubular. conductor 1, a central bore serving for thel tubular conductor -cuter conductorsbrass could-be used which isprepared so that the conductors are flexibleand can bebent to the required shape 1n order to fit the As inner conductor there will'be preferably used a tube concentric with the outer tubular conductor. Such aplant presents thefollowing considerable advantages: It can easily be taken to pieces which is very imortant for temporary lplants such as used or example in exhibitlons. The material could always be used again as it will have been scarcely worn at all. The plants can be put up very rapidly as there is no splicing necessaryl wherefrom results -a considerable saving of work. The electric conductors can be installedev'erywhere immediately as itis merely necessary to bore a` hole in the tubular outer conductor Vin order Ato permit of screwing in the sockets of the incandescent electric lamps. 3

The electric conductor. according to the invention permits to attach an illuminating apparatussuch as a chandelier at the end of the conductor as it is lmerely necessa to connect the poles of the apparatus with the apparatus the one with the outer tube and the. other with theinner conductor which canbe eifected in diiierent manners. Owin to the flexibility of the conductor it is easy Vto understand that an apparatus can be Adirectly mounted on the end of Athis conductor whether this end is straight curved or'inclined in any position.

If the inner conductor is insulated from the outer tubular conductor by means of incombustible insulating rings for example conductors to any support.

by means of glass rings the electric plant is perfectly safe againstiire. The 'safety of such -plants is perfect owing to the arrangement according to which the tube which forms one of the poles envelops completely the other pole and protects the same against contact. The improved conductor can be used for differentrlightings. lIn the outer as many inner conductors arearranged insulated from one another as lightings are required, the holes in the outer tubular conductor being arranged so. that the lamps can be connected with the Vone or with -the other of the inner conductors. If luminous effects are to be obtained by the alternating extinguishing and lighting of a great number of lamps which with the known systems requires complicated arrangements of conducting wires, it is merely necessary to make the inner conductor of the improved electric. conductor movable and providing in the same apertures which cored and if the aperture registers with said socket *the-lamp' will be extinguished.

los

. binations can be ma ner that it moved continuously. v ductor used for connecting a With -this device themost various comde and the most beautiful luminous effects lar conductor a second conductor consisting of the endless band with apertures or insulating parts which is driven in such a man- The conwhich forms the object of this invention can be substituted with canalizations for the cables actually in use which are very 'heavy and difficult to join the one with the other.l If further the insulating devices are made ofglass such a canalization proof against moisture. The tubular conductors could further be flexible and terminated at one end in such a manner i that a lamp or a convenient apparatus can be mountedon this end the other end being closed by a contact plug designed to be inserted intova canalization, said tubes serving for the same purpose as the tubes actually gas apparatus with the gas main.

1. An' electric conductor designed principally for luminous signs and similar purposes consisting of a tubular outer conductor having threaded holes for the insertion of the sockets of incandescent electric lamps and an inner conductor located in said tubu- -lar conductor, means for insulating the inner conductor from the outer conductor, incandescent lamps placed in the outer conductor in such a manner that one pole of the filament is connected with said outer conductor the other pole being connected with the inner conductor,'a curved blade spring under said inner conductor for pressing the same upward, means for connecting the outer conductor with one of the poles of a source of electricity and means for connecting the inner conductor with the pole of electricity, `substantially as described and shown and for the-purpose set forth.

2. An electric conductor designed principally for luminous signs and similar purposes consisting of a tubular outer conductor having threaded holesfor the insertion of' the sockets of incandenscent electric lamps and an inner conductor located in said tubular conductor, means for insulat-v` ing the inner conductor from the outer` conyductor, incandescent can be obtalned.` There could be arranged in the outer tubu' subterranean l ing the latter yieldingly in outer conductor 1n such a manner that one pole of the filament is connected with said outer conductor the other pole being connected with the inner conductor, means for connecting the outer conductor with one ofthe poles of a source of electricity and means for connecting the inner conductor with the pole of electricity, sulatlng material in the ends of said tubular outer conductors carrying the means for feeding electricity to said conductors, substantially as described and shown and for the purpose set forth.

3. A5 'device' of the character described, comprising a substantially tubular conductor, a second and bare conductor disposed therein and insulating devices interposed between the inner wall of the tubular conductor and the second conductor for maintain"- position, the tubular conductor being provided with threaded openings to receive the socketsof lamp filaments, such sockets constituting one pole of each of the filaments and lying in electrical contact with the tubular conductor, and the other pole of each filament be'- ing moved into electrical contact with the inner conductor when the sockets are screwed in place.

4. A device of the character described, comprising a continuous integral and substantially tubular conductor, a second conductor disposed therein and insulating devices interposed between the inner wall of the tubular conductor and the second conductor for maintaining the latter inposition, the tubular conductor being provided with a series of openings to receive the sockets of lamp filaments, such sockets constituting one pole of each of the filaments and lying in electrical contact with the tubular conductor. and the other pole of each filament of each lamp of the series being moved into electrical contact with the common inner conductor when the sockets are in place.

In witness whereof' I have hereunto set my hand in the presence of two witnesses.

GUSTAVE WEISSMANN.

v'Witnessesz ALFRED FREY, Guns. P. PREssLEY. 

